Pull-switch socket



June 29 1926.

C. E. WARNER- PULL SWITCH SOGKET original Filed Sept. 7, 1920 3 Sheets-Sheet 1 June 29,1926.

6. E. WARNER PULL swli cfl SOCKET Original. iled Sept. 7, 1920 3 Sheets-Sheet 2 June 29,1926. 1,590,216

C. II. WARNER PULL SWITCH socxm'.

Original Filed Sept. 7, 1920 3 Sheets-Sheet 3 Figs/lie a section on the line 4 4 Patented June 29,1926

Unit-En sta CHESTER E. WARNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO BENJAMIN ELEGTRZ MANUFACTURING .COMPANY,-OF-GHICAGO, ILLINOIS, A GOBPGRATION OF ILLINOIS.

PULL-SWITCH SOCKETQ Application filed September 7, 1920, Serial hly invention relates to-circuit controlling a provide a pull switch socket which will be etiicient and durable in use, simple in construction and cheap to manufacture.

A further object of .my invention is to provide a pull switch socket having aswitch mechanism, which is capable of handling currents of large wattage. Such sockets are now called upon "to carry current for electrio fiat irons, yacuum cleaners, and other devices taking mo re current .th an the sockets commonly in use are capable of handling, and in view of the limited space available in the ordinary socket it has been a matter of great lillfilCillilYilO produce a pull switch mechanism which could be safely employed in a socket ot the present type. This is accomplished in the socketand switch mechanism forming the subject matter of the present invention. 2 i

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings in whichtwo embodiments of n'iy invention are shown:

Fig. 1 is a top .plan view of a pull switch .0 angle socket;

Fi Fig.

ig: 3 is ,a section Fin. 2"

'2' isa section on the line 2?2 of on the line 3+3 or f or Fit-Ii 5;

Fig. 5 is Fig. 2

6 .a .disassociated perspective View a section on the line .5, 5 of o of part of the switch mechanism;

Fig. 7 is a perspective view of a comhined wiring terminal and switch contact;

Fig. 8 is a perspective view ot' the switch irame;

9 is a section substantially on the line 9-9 of Fig. 10 of a straight pull switch socket;

F 10 is a side elevational view of the socket with the casing broken away;

Fig. 1 1 is a bottom plan view-o1 the interior socket construction;

Rig. 12 is a top plan view of the interior socket construction;

13 is a section on theline 13.713 of and threaded into the binding wir ng terminal 22.

No. 408,580. Renewed November 27, 1925.

Fig. .14 is a perspective view of the switch it. ,ii'ame.

Referring now to Figs. 1 to 8 inclusive,

the pull switch angle socket shown therein comprises a threadedshell contact20, a center contact 21, a wiring terminal 22, for the shell contact 20, wiring terminal 28 for the center contact 21, switch mechanism 2% for controlling the circuit between the center contact 21 and its wiring-terminal 23, a ,one-oiece insulating base 25 for supportingthe shell contact 20, the center contact 21, the wiring terminals 22 andv 23,7and the switch mechanism 24, and a sheet metal casing 26 .surroundingthe insulating base and threaded shell contact 20. The threaded contact is always electrically connected with its wiring terminal by means ofa screw 27 (Figs. 1 and 3) which extends throughregistering 0penings in the flange 28 of the threaded shell contact and the insulating base and is plate 29 of the The switch mechanism 21%. controls the circuit between two stationary switchfcontact members 30 and 31(Figs. 1 and 4.), the contact member 30' being always electrically connected with the center contact 21 by means of a tubular metaleyelet 32, and the contact -meinber 31 being formed as part ot an integral sheetmetal stamping .22, (Fig. I s e i) this stamping being formed to provide,

in addition to ti'lEgCOliiltiCt inemher2l a {bindonly serves to electricallyconnect thecontac 30 and the center contact 21 but also serves to hold the parts in position on the insulating base. .The stamping 33 is held in place on the insulating base by means-of a screw 86 (Fig. 4-) threaded int-othe base portion of the stamping33.

The switch mechanism 24: comprises in additionto the switch contacts 30 and 31, a pivoted 'oscillatable switch blade 37, formaking and breaking the electrical connection between the contacts and 31, an Sshaped bent wire spring 38 (Fig. 6)

bearing on the switch blade 37 and shiftable back and forth pasta dead center to cause oscillation of the switch blade :37, a U-shaped connecting link 39, pivotally connected to one end of the shaped spring 38, a con'ibined crank shaft and pivot pin member 40 pivotally connected with the connecting link 39 for driving it, a driven ratchet member 41 secured to drive the crank shaft 46, a combined lever and driving ratchet member 42, oscillatably. mounted on the pivot pin 40 for driving the ratchet member 41, a pull chain 43 secured to the lever member 42, a pivot pin 44 on which the blade 37 is oscillatably mount-ed and a sheet metal switch frame 45 (Fig. 8) for supporting the pivot pin 44, crank shaft and pivot member 40 and other parts of the switch mechanism.

The oscillatable switch blade 37 comprises an insulating member 46, which may be of sheet fibre, pivotally mounted on the pivot pin 44, and a contact member 47 for controlling the circuit between the switch contact members 30 and 31. This contact member 47 may be a sheet metal stamping, straddling the insulating member 46 and having a pair of opposed projections or lugs 48 ex- 7 tending, into a notch in the upper edge of the insulating member 46, the lower portion of the contact 47 having an opening to receive an extending lug 49 upon the insulating member 46, the projection 48 and the lug 49 serving to position the contact member 47 and hold it in place on the insulating member 46. This manner of supporting the contact member 47 permits'it to yield slightly and to adjust itself to the switch contact members 30 and 31 in operation.

For limiting the oscillating movement of the insulating member 46, the switch frame 45 is provided with a laterally extending integral projection50 (Fig. 8), which in.

one position of the insulating member 46 engages a shoulder 51 on the insulating member 46, and in another position engages a shoulder portion 52 on the insulating member 46. This prevents the entire shock of the switch blade from coming onto the contact members 47, 30 and 31.

The S-shaped bent wire spring 38 straddles the insulating switch blade 46 and has a transversely extending pivot portion 53, for engaging a pivot notch 54 in the switch blade member 46. The ends of the bent wire spring 53 are bent outwardly to provide pivot portions 55 which extend into openings 56 in the side arms of the U-shaped connecting link 39 to 'pivotally connect the link 39 with the bent wire spring 38.

The upper end of the U-shaped connecting link 39 is provided with a pair of openings 57 through which the crank pin por tion 58 of the crank shaft member 40 extends. The crank shaft member 40 may be formed of apiece of wire of uniform thickness, formed into the shapeshown in Fig. 6, to provide a circular disc portion 59, from which the crank pin 58 extends, and a flattened portion 60-for engagement with a slot 61 in the driven ratchet member '41, whereby the crank shaft member 40 is caused to rotate with the driven ratchet n'xen'ib r 41.

The driven ratchet member 41 may be formed of a sheet metal stamping,shaped to provide a cup-shaped journal portion 62, which has a bearing in an opening 63, formed in the bracket portion 64 of the switch frame 45. The end of the crank shaft 40 has a bearing in an opening 65, formed. in the bracket member 66 of the switch frame 45, the crank shaft member 40 being thus supported for rotation in the bearing openings 63 and 65. The bracket 64 also has a bearing opening 66 to receive the end of the pivot pin 44 on which the switch blade 37 is mounted.

The combined driving ratchet member and switch lever 42 is provided with a pair of ratchet teeth 67, which engage corresponding ratchet openings 68 in the driven ratchet member 41. The member 42 is provided with a chain rail portion 68 for receiving the pull chain 43, the pull chain be ing held in place between this chain rail portion and the outer portion of the driven ratchet member 41.

For returning the switch lever 42 after it has been operatedby the pull chain 43 and for holding the driving ratchet member over against the drivenratchet 41 to cause the ratchet teeth 67 to engage the ratchet opening 68, a coil torsion and compression spring 69 is provided, one end of which is secured to a lug 70 on the switch lever and the other end of which is secured to the switch frame 45. The spring 69 is under a compression so that it tends to force the driving ratchet 42 over against the driven ratchet member 41, to cause the ratchet teeth 67 to engage the ratchet open-- ings 68. i

The connecting link 39 bears against and is supported by the pivot pin 44, on which the switch blade 37 is mounted, and the crank shaft 40 in its movement swings the spring 38 past a dead center, to cause a quick movement of the switch blade 37. Each pull upon the pull chain 43 moves the driven ratchet member 41 180 degrees and also causes the crank pin 58 to move 180 degrees. This movement of the crank pin 58 through 180 degrees shifts the pivotal point of connection between the connecting link 39 and the spring 38 at 55 past the dead center line between the pivot portion 53 of the spring and the pivot pin 44*of the switch blade, and causes a quick movement of the switch blade 37 to make or break the circuit between the contacts 30 and 81. The ends of the crank shaft 40 may be pinched together to flatten them, as indicated at 71 and 72, to hold the parts in their assembled position. For limiting the return movement of the switch lever 68 under the action of the portion spring 69, the switch frame to is provided with a stop projection 73 which is engaged by the hook portion 7 1 of the chain rail 68 on the return movement of the chain rail. 7

In the straight pull switch socket shown in Figs. 9 to 14 inclusive,.the switch mechanism may be the same as in the form just described, with the exception of the switch frame, the similar parts including the switch blade 37, the vSshaped spring 38, the connecting link 39, the crank shaft and pivot pin member re, the driven ratchet 41, the combined driving ratchet and switch lever member 42, the pull chain 43, the pivot-.pin let, and the coil spring 69. In thestraight socket, however, the switch mechanism is mounted between two insulating base parts 76 and 77, and the switch blade 37 oscillates in a horizontal plane transverse to the axis of the sockets.

The threaded shell socket 78 is always electrically connected with its wiring terminal 7 9 by means of the screw 80, which also holds the wiring terminal 7 9 and the threaded shell contact 78 in place on the insulating base part 77. The upper insulating base part 76 is secured to the wiring terminal 7 9 by means of a screw 81 (Figs. 9 and 10).

The switch blade 37 controls the circuit between the center contact 82 and its wiring terminal 83, by controlling the circuit between the two switch contacts 83 and 84 (Fig. 13). The contact .183 is always electrically connected with the center :con-

tact 82 by means of a tubular metal eyelet 85. The binding plate portion .86 of the wiring terminal 82 is clamped against the contact linger 8% by means of a screw 87 (Fig. 13), which also holds the contact 8% and binding plate portion 86 in position with respect to the upper-insulating base 76.

The switch frame (Fig. 14) has a bracket portion 88 having a bearing opening 89, to receive the journal port-ion 62 of the driven ratchet member 41.

For limiting the movement of the switch blade 37, a projection 90 is provided, extendinglaterally from the switch frame 75, in posit-ion to be engaged by the shoulder portions 91 and 92 of the switch lever 8?, to limit the oscillatory movement of the switch lever. A stop projection 98 is ,pro vided to limit the return movement of the driving ratchet member x 22 under the action of the return spring 69. A bearing opening $4 is provided .inlbracket portion 95 of the switch frame for the axial portion (of the crank ,shaft anember A0. A bearing opening 96 is provided in the switch frame for one end of the pivot pin 44, on which the switch blade .37 is oscillatably mounted. .An opening 97 is provided in the switch pended claims. 7

Having thus described my inventlon,

what I claim as new and desire to secure by Letters Patent of the United States is:

1. A switch mechanism comprising a'pivoted switch blade, oscillatable back and forth, a spring bearing on said switch-blade, and shiftable back and forth past a dead center .to cause oscillation of said switch blade, and ..means for shifting said spring, comprising a link having one end connected with the spring and a crank connected to the other end of the link, and a support with which said link has a slidi-ngengagement.

2. A switch mechanism comprising a pivot pin, a switch blade pivoted on said pivot pin and oscillatable back and forth, a

spring bearing on said switch blade and shiftable back and forth past a dead center 'to cause oscillation of said switch blade, and

means forshiftingsaid spring comprising a link having "oneend connected with the springzand-sl-ida-bly engaging said pivot pin, and acrank connected to the other end of the link. 7 v

3. A switch. mechanism comprising a pivot pin, a switch blade pivoted ionsaid pivot pin and oscillatable back; and forth, a spring bearing on said switch blade and shiftable back and forth past a dead center .to cause oscillation of ssaid switch blade,

and. means for shifting sai'dsprin'g comprising a link having one. end connected with the spring and slidably engaging said pivot pin.

4. A switch mechanism con'iprising a pivot pin, aswitch blade pivoted on said pivot pinand oscillatable backand forth, a spring bearing on said switch -iblade and shiftable back and forth-past a dead center 'to cause oscillation of said switch blade,-and

means for shifting :said spring comprising link having one end connected. with the spring and-slidably engaging said pivot pin. and a rotatable member for actuating said .link.

A switch mechanism comprising aqiiv- .llll) switch blade and shiftable back and forth past a dead center to cause oscillation of said switch blade, and means for shifting said spring comprising a link straddling said switch blade and having one end connected with said spring and a crank con nected to the other end of the link.

6. A switch mechanism comprising a pivoted switch blade, oscillatable back and forth, a wire compression spring bearing on said switch blade, and straddling said blade, and shii'table back and forth past a dead center to cause oscillation of said switch blade, and means for shifting-sair spring comprising a link straddling said switch blade and having one end connected with the spring, and a crank connected with the other end of said link. 7 V Y 7. A switch mechanism comprising a pivot pin, a switch blade pivoted ,on said pivot pin and oscillatable back and forth. a spring bearing on said switch blade and shiftable back and forth'past a dead center to cause oscillation of said switch blade, and means for shifting said spring comprising a link straddling said switch blade and slidably engaging said pivo having one end connected withsaid sprii g, and a crank connected to the other end of said link.

8. A switch mechanism comprising a pivot pin, a Switchblade pivoted on said pivot pin and oscillatable back and forth, a compression spring bearing onsaid switch blade and shiftable back and forth past a dead center to cause oscillation of switch blade, and means for shifting said spring comprising a link straddling said switch blade and slidably engaging said pivot pin, and having one end connected with said spring.

9. A switch anechanism comprising a pivoted switch blade, oscillatable back and forth, an S-shaped compression spring hearing on said switch blade and shiftable back and forth past a dead center to cause oscil-' lation of said switch blade, and means for shifting said sprlng comprising a link having one end connected with said spring, and

a crank connected to the other end of the link.

10. A switch mechanism comprising a pivoted switch, oscillatable back and forth, an S-shaped compression spring bearing on said switch blade, and having one end pivotally connected with said switch blade, and shiftable back and forth past a dead center to cause oscillation of said switch blade, and means for shifting said'spring comprising a link having one end pivotally connected with the other end of said S-shaped spring and a crank connected to the other end of said link.

11. A switch mechanism. comprising a pivoted switch blade,oscillatable back and pin, and

forth, a compression spring bearing on said switch blade and shiftable. back and forth,

past a dead center to cause oscillation of said switch blade, said spring being formed of bent wire and comprising two U-shapcd portions straddling said switch blade, and two pivot pin portions extending outwardly from said U-shaped portions, and means for shifting said spring con'ip'rising a U-shaped link having openings therein to receive said pivot pin portions. I

12. A switch mechanism comprising a switch blade having an oscillatably mounted insulating member, and a contact member straddling said insulating member, said insulating member having a notch therein, and the ends of said contact member having lugs extendin into said notch, said insulating member having a projection thereon, said contact member having an opening therein into which said projection extends. 13. A switch mechanism comprising a pivoted switch blade oscillatable back and forth, a compression spring bearing on said switch blade and shiftable back and forth past a dead center to cause oscillation of said switch blade, and means for shifting said spring, said spring comprising an integral bent member having two S-shaped portions one. on each side of said switch blade. A s *itch mechanism comprising a pivot pin, a switch blade pivoted on said pivot pin and oscillatable back and forth, a spring bearing on said switch blade and shiftable back and forth past a dead center to cause oscillation of said switch blade, and means for shifting said spring comprising a link having one end connected with the springand slidably engaging said pivot pin, and means connected to the other end of the link for actuating it.

15A switch construction comprising an oscillatable switch. blade, a switch frame having alarge bearing opening and a small bearing opening, a crank shaft having a large journal in said large bearing opening and a small ournal insaid small bearing opening, a crank pin extending from one side of said large journal and transmission from said crank pin to said switch blade.

16. Aswitch construction comprising an oscillatable switch blade,- a switch frame having a large bearing opening and a small bearing opening, a crank shaft having a large journal in said large bearing opening and the small journal in said small bearing opening, a crank'pin extending from one side of said large journal and transmission from said crank pin to said switch blade, a.

boss extending from the other side of said large-journal, and a ratchet member engaging said boss for rotating said crank shaft.

In witness whereof, I have hereunto subscribed my name.

CHESTER E. WVAR-NER. 

